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Debt and Capital - Additional information (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Debt and capital [line items]        
Undrawn borrowing facilities $ 10,239 $ 6,125    
Cash and cash equivalents $ 6,201 3,025 $ 3,604 $ 4,058
Description of changes in LIBOR rate A reasonably possible change in the USD London Interbank Offered Rate (USD LIBOR) (+1.5%/-1.5% (2021: +1.0%/-1.0%)), with all variables held constant, would not have a material impact on the Group’s equity or the income statement in the current period.      
Other financial assets $ 797 427    
Interest rate swap contract [member] | Cash flow hedges [member]        
Debt and capital [line items]        
Nominal amount of financial instrument interest rate swaps used to hedge credit risk 600      
Interest rate benchmark rates not exposed to cash flow hedge [member] | Currency swap contract [member]        
Debt and capital [line items]        
Derivative financial liabilities 5 9    
Interest rate risk [member] | Interest rate benchmark rates not exposed to cash flow hedge [member]        
Debt and capital [line items]        
Cash and cash equivalents 6,143 2,962    
Interest bearing liabilities excluding transaction costs 83 367    
Other financial assets $ 167 $ 0